For over a decade, Mackie Big Knob has been the go-to monitor controller for studios the world over. But, now that they've added in the high-resolution goodness of an Onyx recording and playback solution, Big Knob Studio+ truly becomes the nerve center for your studio. In addition to its usual professional source and monitor selection, it offers a flexible 2x4 USB recording interface with two of Mackie's flagship Onyx mic preamps.FeaturesProfessional source and monitor selectionClassic "Big Knob" volume controlMono, mute, and dim functions2 x 4 USB interfaceCue mix allows controlled blending of signals for zero-latency recording; flexibility in recording paths optionsTwo boutique-quality Onyx mic preamps with phantom powerBuilt-in inputs for talkback mic and footswitch controlCompatible with all major DAWsComes with Waveform OEM recording softwareSpecificationsFrequency Response (unity gain, +4 dBu input):All Inputs: ±0.5 dB, 20 Hz - 20 kHzAll Outputs: ±0.5 dB, 20 Hz - 20 kHzNoise Characteristics (150 Ω terminated, 22 kHz bandwidth):Mic Inputs to Outputs (EIN):< -125 dBu RMS, A-weightedLine Inputs to Outputs:< -90 dBu RMS, un-weightedDistortion (THD+N) (unity gain, 1 kHz @ +4 dBu input, 80 kHz bandwidth):All Inputs to Outputs:< 0.01%, un-weightedCrosstalk between Left and Right (unity gain, -1 dBFS input):Mic Inputs to Outputs:< -60 dB at 1 kHzLine Inputs to Outputs:< -60 dB at 1 kHzAttenuation:Muted: -60 dBDim: -20 dBMaximum Levels (before clipping):All Inputs: +22 dBuAll Outputs: +22 dBuInput Type: Female XLR balanced/unbalanced, female 1/4" balanced/unbalanced, female 1/8" unbalancedOutput Type: Female 1/4" balanced/unbalancedUSB Format: USB 2.0, 24-bit, 192 kHzUniversal Power Supply: 100-240 V~ 50/60 Hz 0.75ADimensions (H x W x D): 3.2" x 11.9" x 6.8"Weight: 4.6 lbs. Mackie Big Knob Studio+ Big Knob 4X3 Studio Monitor Controller, USB Interface, 192 Khz.